81964000

素因数分解:

$2^5\times 5^3\times {\mathrm{31}}^1\times {\mathrm{661}}^1$

素因数の和:717

約数の個数: 96

約数和(自身を含む): 208196352

約数和(自身を除く): 126232352

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 31, 32, 40, 50, 62, 80, 100, 124, 125, 155, 160, 200, 248, 250, 310, 400, 496, 500, 620, 661, 775, 800, 992, 1000, 1240, 1322, 1550, 2000, 2480, 2644, 3100, 3305, 3875, 4000, 4960, 5288, 6200, 6610, 7750, 10576, 12400, 13220, 15500, 16525, 20491, 21152, 24800, 26440, 31000, 33050, 40982, 52880, 62000, 66100, 81964, 82625, 102455, 105760, 124000, 132200, 163928, 165250, 204910, 264400, 327856, 330500, 409820, 512275, 528800, 655712, 661000, 819640, 1024550, 1322000, 1639280, 2049100, 2561375, 2644000, 3278560, 4098200, 5122750, 8196400, 10245500, 16392800, 20491000, 40982000, 81964000]

約数ペア:

[(1, 81964000), (2, 40982000), (4, 20491000), (5, 16392800), (8, 10245500), (10, 8196400), (16, 5122750), (20, 4098200), (25, 3278560), (31, 2644000), (32, 2561375), (40, 2049100), (50, 1639280), (62, 1322000), (80, 1024550), (100, 819640), (124, 661000), (125, 655712), (155, 528800), (160, 512275), (200, 409820), (248, 330500), (250, 327856), (310, 264400), (400, 204910), (496, 165250), (500, 163928), (620, 132200), (661, 124000), (775, 105760), (800, 102455), (992, 82625), (1000, 81964), (1240, 66100), (1322, 62000), (1550, 52880), (2000, 40982), (2480, 33050), (2644, 31000), (3100, 26440), (3305, 24800), (3875, 21152), (4000, 20491), (4960, 16525), (5288, 15500), (6200, 13220), (6610, 12400), (7750, 10576)]